Overall,I think that ethanol from corn is a joke.It grows too slow and is not very efficient at photosynthesis.It's been basically a big scam and a fiasco.Same with soybeans.A few big swindlers will get rich off the government,taxpayers,and you and I...while driving up food prices and ruining the environment.
If you really want to get serious(instead of ludicrous),industrial hemp and algae are the best ways to go about it.But the DEA(Drug Enforcement Administration)makes a big fuss about hemp and makes a mountain out of a molehill.Most of their arguements are silly and don't hold up to the real facts.There's simply not enough of the psychoactive THC ingredient in industrial hemp to get anybody high.I wonder if it's still because of big oil business politics controlling the government(so much for being brainwashed about how we still live in a democracy that is not run by a few wealthy elites).I for myself can't comprehend why oil companies would be against it.In fact,why can't they diversify their businesses into agriculture and grow hemp themselves?As time goes by,renewable hemp will be more economic and profitable to produce than non-renewable oil as they have to invest more money to extract the remaining difficult stuff from shale,tar sands,and etc.
However,that is not to say that existing ethanol plants can't eventually evolve into something better as time goes by.For example,ethanol plants could eventually be modified for butanol,which in many respects is a better alcohol fuel.And instead of low productivity corn and sugar beets,why not cellulosic butanol from industrial hemp by somehow modifying existing ethanol plants?
Hemp and also fast-growing algae shoud take far less landspace,harm the environment less,and not compete with food production to feed a hungry world population.I think this is the best route to eventually be taken for biofuels.